Asteroid expert Professor Simon Green joins the Space Boffins to discuss missions to collect samples from space rocks and return them to Earth, and the perils of re-directing asteroids heading our way. Richard and Sue also chat to Romanian astronaut Dumitru-Dorin Prunariu about life on the first international space station, Salyut 6, and Europe's ambitious Mercury mission gets packed-up ready for launch. Like this podcast? Please help us by supporting the Naked Scientists